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Optical Engineering

Simultaneous strain and temperature measurement using a no-core fiber-based modal interferometer with embedded fiber Bragg grating
Author(s): Shaowei Yu; Li Pei; Chao Liu; Yiqun Wang; Sijun Weng
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Paper Abstract

A simple fiber-optic sensor based on a fiber Bragg grating (FBG) embedded in a fiber modal interferometer (MI) for simultaneous measurements of temperature and strain is proposed and experimentally demonstrated. The fiber MI is constructed by splicing two sections of the no-core fiber (NCF) between the single-mode fibers. Due to the different responses of the NCF-based MI and the FBG to the same temperature and strain, the discrimination between temperature and strain can be easily achieved. For a 0.01-nm wavelength resolution, the resolution of the sensor is 0.216°C and 6.75  με in temperature and strain, respectively.

Paper Details

Date Published: 15 August 2014
PDF: 4 pages
Opt. Eng. 53(8) 087105 doi: 10.1117/1.OE.53.8.087105
Published in: Optical Engineering Volume 53, Issue 8
Show Author Affiliations
Shaowei Yu, Beijing Jiaotong Univ. (China)
Li Pei, Beijing Jiaotong Univ. (China)
Chao Liu, Beijing Jiaotong Univ. (China)
Yiqun Wang, Beijing Jiaotong Univ. (China)
Sijun Weng, Beijing Jiaotong Univ. (China)

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